Mexico

I have been busy putting together new material for SIM 3 training, and AES seminar and the upcoming Broadway Sound Master Class. You have seen some of the work in progress below, but I have had to push to get things ready for showtime. Sorry for the delay in getting more things posted and for my lateness in response to Goran. Just pushing it right now – LOTS of really good stuff coming- phase circles galore but priorities………..

AES Expo

I was invited to give a talk for the AES at the Sound Check Expo in Mexico City

This is a big audio trade show in Mexico City. Lots of levels of gear mixed together: Pro Audio, Music Industry Audio, Guitars, Pianos, Disco lighting , and the most popular event was getting the autograph of a hot young girl singer. I am sorry but I never made it to the front of the line. :-(.

I did a talk for about 1.5 or hours and it was like giving a speech at the United Nations. There was a faint spanish language echo in the room when I spoke, about 500 ms delayed. It was a translator in a booth at the rear and everybody in the audience was listening on headphones. Wow, this guy was fast – and good, because I even got a few laughs at my jokes. I remember doing a translated seminar once in China. 4 days without a single laugh – until I tripped and fell down on the stage – the crowd loved THAT! OK back to Mexico. The lecture was very well attended and it was a great honor to have so many people there. We covered alot of interesting topics including subwoofers steering and fun stuff like that. I was told that this was the best attended training session of the convention (about 120 people) and that felt really good. If only I could have gotten the singer girl to join me on stage we would have REALLY filled up the place!

Here are two pics from the seminar. The first one shows me at the podium. I don’t remember the bubbles floating around the room, but you can see them in the picture. The second one shows the view in the room.

SIM3 Seminar

Next on the agenda was Meyer Sound Mexico where we held a SIM3 Training. It was the usual 4 day session, but in Mexico City the sessions are marathons. Typically we go from 10 am to 7pm, but two of the days we went past 9 pm. The Mexico city schools are some of the most interactive of all the schools I do. The students are sendiing up a constant stream of interesting and challenging questions and we cover SO MUCH material. Sometimes the order in which we cover them is a bit crazy, but we cover TONS of topics.

Working with me on this seminar was Oscar Barrientos and Mauricio Ramire(el Magu). These are expert teachers in their own right so it is great to have them to translate and enhance. My typical style, when doing a translated seminar, is to (try) keep my talking short, to make quick switches to the translators. With these guys, because they know the subject so well, they can follow the concepts and even expand on what I say when they move it into Spanish. This helps speed things along alot – because typically a translator has no audio knowledge, does not know the terms, and certainly does not know FFT analysis. (In Korea once we had a translator QUIT at lunch time the 1st day – because she was too humiliated by all the students telling her she was translating all the audio words wrong. A student, Sean Cho, took over the job and saved the seminar).

Most of the students had been to Magu’s and/or Oscar’s training courses before and a few (Eduardo Brewer from Venezuela and Jorge and Juan Carlos Yeppes) had even been to my course before. It is the ultimate honor for me to have engineers return to my course. The advanced level of the students helped us to move along at a very fast pace. I am always very grateful about the way i am treated in Mexico. They are SO GOOD to me.

I also had the honor of meeting Luis Pinzon. He is the only person I know with 3 copies of my book – 1st & 2nd edition ingles, and 1st edition espanol. I happily signed all 3 for him. I wish I had brought a Chinese version to give to him. That would have completed the set! . Luis also gave me his cable checker – which is quite amazing.

I was taken to some really nice restaurants by Antonio Zacarias and also we went for Tacos to El Charco – which I highly recommend. Also went to a Chinese restaurant in a shopping mall near Meyer Sound Mexico – I DON’T recommend this place, unless you want to die. Funny though ….A week later I had Mexican food in China – The Mexican food in China was better than the Chinese food in Mexico, but Mexican in Mexico and Chinese in China worked out the best.

So here are some photos from the Mexico seminar, taken by Eduardo and Hermes. I think I have the names right on the class photo – if not help me out please. Also if you have some others – please send them to me.

Thanks for inviting me to Mexico, and I hope I can come back soon —actually I WILL be back in Mexico this Novemeber – but it a cruise vacation – so I won’t be working 🙂

Until next time,

Hasta luego y Buena Suerte

6o6

Mexico SIM3 Class 2010

6o6 is getting some hands on experienceNow we know who was reading email during class

This is the game plan for tuning... OMG! — Yes this is supposed to make sense..........

Eduardo, Magu, Hermes, 6o6, Oscar and the bald guy

6o6

So I was getting reasdy for my seminar here in Mexico city. About an hour before and I find that the graphics were mislabeled. Particularly problem was the one that had the wrong autocad backrground – the acoustical cancelled where the phase lines showed IN PHASE. OOOPPPPPPPs. Sorry. Should be fixed now.

So I got ahead of myself with last post, showing some of the eartly results of my latest venture: phase mapping to help predict and understand speaker array behavior. I have been very and soon some of the data will show up here. But first an introduction to the basic item driving this: wavelength. What we will using here are concentric circles, scaled to wavelength – and MOST importantly adjusted for phase delay. When you have a single speaker you will see concentric circles coming outward from it (by see it i mean HERE) – if you see these at a job, consult a physician. The circles are scaled to wavelength. If you place another speaker it has its own set of circles. Where they meet – they are in phase – when they are half a wave apart – they are 180 degrees out.

So I have now a library of 48 sets of circles scaled to 125 Hz. They can then be rescaled to other freqs. Now we can start to put them to use…………….

Now here is where it gets rough. When you delay a speaker we know it changes the places in the room where we add and cancel. But how can we see that? Delay does NOT move the center of the speaker’s radiation. Nor does it change the size of the wavelength. What it does is modify where the race starts from, by elapsing PART of the wavelength electronically. The rings show the distance required to turn 360 degrees (1 wave). It we delay it 180 degrees, we have a head start. The 1st cycle is completed in half the physical distance. From then on it continues to turn at the regular rate – but that head start changes where in the room cycles match. It is late here – this is again just a preview……………..

So I have now a library of 48 sets of circles scaled to 125 Hz. They can then be rescaled to other freqs. Now we can start to put them to use…………….

Getting caught up……3rd update

Off to Mexico for AES and SIM3 Training – Updated

Phase Wavelengths Intro